Request status when connecting

Summary:
Send requestNowPlaying packet when a player is discovered
Depends on D12546

Test Plan: Restart daemon, open app. Status is now displayed correctly, previously it was not until the first update

Reviewers: KDE Connect, apol

Reviewed By: KDE Connect, apol

Subscribers: KDE Connect

Tags: KDE Connect

Differential Revision: https://phabricator.kde.org/D12550